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No clue why the 3f was mentioned other then maybe there is inconsistency in the material from different manufacturers.

i was thinking the same thing . 2F does have a lower pressure spike so that could be the case .

i also found it interesting that the failure of both the CVA and TC rifles barrels seemed to be similar
� though I would agree this is just by looks of the video so hard to tell for sure �

Also the last test debunks myth busters LOL

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